Which gaming company famously used biometric feedback (heart rate, eye tracking, sweat response) during playtesting for a major title, leading to a complete redesign that resulted in a 40% increase in player retention?

Behind every successful video game is extensive market research that shapes gameplay, features, and marketing strategies. The gaming industry relies heavily on understanding player preferences and behavior to create engaging virtual worlds that resonate with their target audience. This trivia question explores how one major gaming company utilized innovative market research to achieve a remarkable breakthrough.

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Epic Games during Fortnite's battle royale mode development
Valve Corporation during Left 4 Dead's development, leading to their 'AI Director' system
CD Projekt Red during The Witcher 3's final combat system balancing
Nintendo during The Legend of Zelda: Breath of the Wild's open world design